JP2004195585A - Boom placing stand device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a boom placing stand device for placing a boom 50 so as to easily perform positioning to a support part of a work machine of installing parts 55a and 56a of the boom 50 when installing the boom 50 on the work machine. <P>SOLUTION: A pair of boom placing bodies 90 are rotatably supported around the axis 91a on an underframe 84, and are constituted so that one end side is placed from a bending part 50a of the boom 50 on one boom placing body 90, and the other end side is placed from the bending part 50a of the boom 50 on the other boom placing body 90. The pair of boom placing bodies 90 are interlocked by a link mechanism 95. The link mechanism 95 interlocks both boom placing bodies 90 so that a boom placing surface 94 of the other boom placing body 90 becomes an installing state of running along the boom 50 when the boom placing surface 94 of one boom placing body 90 becomes a state of running along the boom 50. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a boom mounting table device for mounting the boom on a work machine that performs a work process by supporting a bent boom at a plurality of mounting portions located in a longitudinal direction of the boom.
[0002]
[Prior art]
When the boom is mounted on a working machine that performs a work process such as welding, the crane is used to support the boom. If the boom is supported, the equipment becomes large due to the crane. Further, in order to prevent the gas generated by welding from diffusing, it is necessary to provide a passage through which the hanging rope of the crane passes in the cover covering the working machine, which may be disadvantageous in terms of preventing gas diffusion. . On the other hand, when the boom mounting table device is used, the equipment can be relatively small, or the work implement can be covered well by the cover. For this reason, conventionally, for example, a boom mounting table device as shown in FIG. 30 has been used. That is, a boom mounting table device is used in which the boom 50 is mounted on the boom mounting body 151 fixed to the underframe 150 and is received and supported. (Since there is no prior art document that can be described, it is shown.)
[0003]
[Problems to be solved by the invention]
When the boom is mounted on a working machine using the conventional boom mounting table device described above, it is often necessary to adjust the position of the boom so that the mounting portion of the boom is aligned with the support of the working machine. Was.
That is, even when the boom is mounted on the mounting table device, the boom may be mounted in an improper mounting state displaced in the longitudinal direction of the boom. In this case, even if the mounting part of the boom is to be connected to the support part of the work machine, the mounting part is displaced relatively large with respect to the support part, and the boom is re-mounted on the mounting table device to correct the positional deviation. Operation was needed.
[0004]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a boom mounting table device in which a boom can be easily mounted in a state where a mounting portion of the boom accurately matches a support portion of a working machine, and the structure can be easily obtained. is there.
[0005]
[Means for Solving the Problems]
The configuration, operation and effect of the invention according to claim 1 are as follows.
[0006]
〔Constitution〕
In a boom mounting table device for mounting the boom to a working machine that performs a processing by supporting a boom having a bent shape at a plurality of mounting portions located in a longitudinal direction of the boom, one end side of the bending portion of the boom A boom mounting body for mounting the boom, and a boom mounting body for mounting the other end side from the bent part of the boom, are rotatably mounted around an axis in a direction perpendicular to the boom longitudinal direction. Supported by a frame so that the pair of boom mounting bodies rotate in conjunction with each other, and the boom mounting surface of one of the boom mounting bodies is along a portion at one end side of the bent portion of the boom. Is provided, a link mechanism is provided for linking the pair of boom mounting bodies so that the boom mounting surface of the other boom mounting body is in a state along the part on the other end side from the bent part of the boom. is there.
[0007]
[Action]
The boom is placed over the pair of boom mounts such that the bent portion of the boom is located between the boom mounts. When the boom is mounted on the boom mounting body with the mounting position displaced in the boom longitudinal direction, at the beginning of the mounting, each boom mounting body has a mounting posture in which the boom mounting surface is inclined with respect to the boom. become. However, the boom mounting body rotates around the axis center with respect to the underframe due to a boom load eccentrically applied to the boom mounting body, and the pair of boom mounting bodies is connected to the link mechanism. As a result, each boom mounting body naturally changes its posture in a state where the boom mounting surface is attached along the boom. Then, the boom is shifted in the longitudinal direction of the boom with respect to the underframe due to the change in the posture of the boom mounting body, and the boom is mounted in a mounting condition in which the initial positional shift is eliminated.
[0008]
When the underframe is made to be movable equipped with a transfer device, and the boom is placed on a boom mounting body supported by the underframe and transported across the boom transport conveyor and the working machine, the boom does not have the above-described positional displacement. When the underframe is moved and adjusted to the appropriate position in front of the work equipment, the mounting parts of the boom will be aligned with the support parts of the work equipment to which they are to be connected. To form an underframe. When the underframe is fixed to the work machine and fixed, and the boom is transported by the transfer device to the work machine and is mounted on the boom mounting body supported by the underframe, If the mounted boom is in a mounting condition without displacement, the underframe is configured so that each mounting portion of the boom is aligned with a supporting portion of a working machine to which the boom is to be connected. .
[0009]
〔effect〕
Therefore, even when the boom is placed with a slightly displaced placement state when the boom is placed, the displacement is corrected by automatic adjustment by the boom placement body and the link mechanism, and each mounting portion is accurately attached to the support portion of the work machine. The matching mounting state is obtained, and the operation of positioning the mounting portion to the support portion can be omitted, and the work device can be quickly and easily mounted on the work machine and work can be performed efficiently.
[0010]
In addition, the automatic adjustment of the mounting condition is performed by rotating the boom mounting body due to the boom load. Therefore, as compared with an actuator for operating the boom mounting body or a control means for operating this actuator. Thus, a simple structure in which the pair of boom mounting bodies are rotatably supported and linked by a link mechanism is sufficient, and it is inexpensive.
[0011]
The configuration, operation and effect of the invention according to claim 2 are as follows.
[0012]
〔Constitution〕
In the configuration of the invention according to claim 1, the boom mounting surfaces of each of the pair of boom mounting bodies are formed by rollers.
[0013]
[Action]
When the boom mounting body rotates with respect to the underframe due to the boom load, and the boom mounting surface of the boom mounting body comes into contact with the boom to adjust the boom mounting condition, Due to the rotation of the roller forming the boom mounting surface, the boom is less likely to be twisted between the boom mounting surfaces. As a result, the boom and the boom mounting body slide smoothly relative to each other, and adjustment of the boom mounting condition is performed.
[0014]
〔effect〕
Therefore, the automatic correction of the boom mounting condition can be performed smoothly and quickly, and the work from mounting the boom on the mounting base device to mounting it on the work machine can be performed quickly and efficiently.
[0015]
The configuration, operation and effect of the invention according to claim 3 are as follows.
[0016]
〔Constitution〕
In the configuration of the invention according to claim 1 or 2, the work machine is a work machine that performs the work processing of the boom in one of a plurality of work processing steps in a boom assembly line.
[0017]
[Action]
If the boom is mounted as described above, the mounting condition is automatically adjusted by the rotation of the boom mounting body and the linkage of the boom mounting body of the link mechanism, and the mounting of the boom to the work machine is quickly performed. Reduce the time required for the machining process in the machining process by the work machine, and work while avoiding the boom supplied from the previous process staying or increasing the waiting time for boom supply in the next process. The processing of the processing step can be performed.
[0018]
〔effect〕
Therefore, the work process is performed so that the boom supplied from the previous process is not retained or a long waiting time for the boom supply in the next process is unlikely to occur, thereby improving the work efficiency of the entire boom assembly line. it can.
[0019]
The configuration, operation and effect of the invention according to claim 4 are as follows.
[0020]
〔Constitution〕
In the configuration according to the third aspect of the present invention, the underframe is a underframe of a boom transfer device that transfers the boom over the boom transport conveyor on the boom assembly line.
[0021]
[Action]
The boom placed on the boom transport conveyor is placed on an underframe, taken out of the boom transport conveyor, and transferred to a work machine. At this time, the mounting condition is automatically adjusted by the rotation of the boom mounting body and the interlocking of the boom mounting body by the link mechanism. Thereby, the boom taken out from the boom transport conveyor can be transferred to the work machine while adjusting the mounting condition to be appropriate.
[0022]
〔effect〕
The boom is taken out of the boom transport conveyor and transferred to the work machine for work processing.However, the transfer to the work machine and the adjustment of the mounting condition are performed in parallel. Processing is performed quickly, and work efficiency in the entire boom assembly line is improved.
[0023]
BEST MODE FOR CARRYING OUT THE INVENTION
As shown in FIG. 1, a boom transporting conveyor 1, a boom temporary assembling facility 10 including a boom temporary assembling machine 11 located on a lateral side of a transport start end of the boom transporting conveyor 1, and a boom from the boom temporary assembling facility 10. A boom welding equipment 20 provided with a boom welding machine 21 located on the lower side of the transport conveyor 1 in the transport direction, and a bracket temporary provided with a boom support device 31 located on the lower side in the transport direction of the boom transport conveyor 1 from the boom welding equipment 20. A boom assembling line is constituted by each of a bracket attachment facility 40 and a bracket attachment facility 40 having a bracket welding machine 41 located on the lower side in the transport direction of the boom transport conveyor 1 from the bracket temporary attachment facility 30.
[0024]
This boom assembling line is a boom of a backhoe device in a backhoe as shown in FIG. 2, and is for producing a boom 50 that is bent in an inverted C shape in the longitudinal direction.
That is, as shown in FIG. 3, the boom 50 includes a pair of left and right side plates 51, a top plate 52 connecting one end of the left and right side plates 51 in the width direction, and another end of the left and right side plates 51 in the width direction. A plurality of bottom plates 53 to be connected, a connecting plate 54 to connect the side plates 51 at a plurality of positions in the boom longitudinal direction, and a base end side of the boom 50 are rotatably mounted on a boom support bracket 61 of a swivel base 60 shown in FIG. A pivot bracket 55 for connection, an arm connection bracket 56 for rotatably connecting the arm 62 shown in FIG. 2 to the distal end side of the boom 50, and a boom cylinder 63 for connection to the bottom plate side of the boom bent portion 50a. Boom cylinder bracket 57 and an arm cylinder bracket 58 for connecting the arm cylinder 64 to the top plate side of the boom bending portion 50a.
[0025]
The boom assembly line connects the side plate 51, the top plate 52, the bottom plate 53, the connecting plate 54, the pivot bracket 55, the arm connection bracket 56, the boom cylinder bracket 57, and the arm cylinder bracket 58 in a predetermined combination state and connects them by welding. In this way, the side plate 51, the top plate 52, the bottom plate 53, the connecting plate 54, the pivot bracket 55, and the arm connecting bracket 56 are fixed to the boom temporary assembling machine 11 in the boom temporary assembling facility 10. A temporary assembling process for obtaining a boom 50 in a temporarily assembled state as shown in FIG. 4 is performed by performing a work process of temporarily attaching by artificial welding while being supported in a combined state. In this temporary assembling process, the connection by welding of the connecting plate 54, the pivot bracket 55, and the arm connecting bracket 56 is completed. In the boom welding facility 20, a work process of connecting the side plate 51, the top plate 52, and the bottom plate 53 of the boom 50 in the temporarily assembled state after the temporary assembling process by the boom welding machine 21 by fillet welding a as shown in FIG. Then, a boom welding process is performed to obtain a boom 50 in a state where welding of the side plate 51, the top plate 52, and the bottom plate 53 is completed. In the bracket temporary attachment equipment 30, the boom 50 after the boom welding process is held by the boom support device 31, a boom cylinder bracket 57 is provided on the bottom plate side of the bent portion 50a, and an arm cylinder bracket is provided on the top plate side of the bent portion 50a. A work of temporarily attaching the booms 58 by manual welding is performed to perform a bracket temporary attaching step of obtaining the boom 50 to which the boom cylinder bracket 57 and the arm cylinder bracket 58 are temporarily attached. In the bracket attaching equipment 40, the boom cylinder bracket 57 and the arm cylinder bracket 58 of the boom 50 after the bracket temporary attaching step are connected by the bracket welding machine 41 by welding b as shown in FIG. The bracket welding step for obtaining the boom 50 is performed. More specifically, it is configured as follows.
[0026]
As shown in FIG. 1, the boom transport conveyor 1 is configured as a roller conveyor in which a plurality of rollers 2 arranged in the transport direction are supported by a conveyor frame 3 so as to freely rotate. That is, the boom 50 that has completed the above-described steps is placed on rollers by the pivot bracket 55 and the arm connection bracket 56, and is manually moved so as to be conveyed between the respective facilities.
[0027]
As shown in FIG. 1, the boom welding equipment 20 covers the periphery of a boom support 22 of the boom welding machine 21 so that smoke and the like generated during the welding operation are hardly diffused to the periphery. A cover 26, a suction duct 27 for sucking smoke and the like from the inside of the cover 26, and a boom transfer device 70 located in front of the boom welding machine 21 are provided.
[0028]
As shown in FIGS. 7, 9, and the like, the boom transfer device 70 includes a pair of free-wheeling front and rear wheels 71 on a pair of rails 8 laid from near the boom welding machine 21 to below the boom transport conveyor 1. And a supporting frame 75 which is supported by a frame 73 of the cart 72 via a lifting device 74 using a pantograph-type link mechanism, and which is moved up and down with respect to the cart frame 73 by the lifting device 74. A pair of right and left bogie front and rear guide rails 76 fixed to the support frame 75 are supported via a freely rotatable wheel body 81, and are supported along the guide rails 76 with respect to the support frame 75 in the bogie front and rear direction. The moving boom mounting table device 80 is provided.
[0029]
As shown in FIG. 11, the boom welding machine 21 includes a boom support 22 having an intermediate portion rotatably connected to a support shaft 23a on an upper end side of a column 23 erected on the ground. It is provided with a welding arm 25 hanging from a ceiling rail 24 located above the body 22 and the like.
[0030]
Thereby, in the boom welding equipment 20, the work processing of the boom welding is performed as shown in FIGS.
[0031]
That is, as shown in FIG. 12 (a), the lift valve (not shown) is operated to descend by the operation pedal 77 as shown in FIG. Then, a lift cylinder 74a as an air cylinder of the lift device 74 as shown in FIG. 9 is operated on the lower side, and the lift device 74 lowers the support frame 75 and lowers the boom mounting table device 80. When the boom mounting table device 80 is lowered to the stroke end, the bogie 72 is manually pushed forward by a fixed handle 78 provided at the rear of the bogie 72 as shown in FIG. Is moved toward the boom conveyor 1. At this time, the boom mounting table device 80 is artificially slid toward the front of the carriage and moved to the front end side of the support frame 75. When the pair of left and right boom placement bodies 90 of the boom placement table device 80 enters below the bent portion 50a of the temporarily assembled boom 50 placed on the rollers of the boom transport conveyor 1, FIG. As shown, the movement operation of the boom transfer device 70 is stopped, and the lift valve is operated by the operation pedal 77 to the ascending side. Then, the lift cylinder 74a operates on the ascending side, and the lift device 74 operates to raise the boom mounting table device 80. A pair of boom mounting bodies 90 of the boom mounting table device 80 abut against the bottom plate 53 of the boom 50 to perform a push-up operation, and the boom 50 floats from above the rollers of the boom transport conveyor 1, and a pair of booms of the boom mounting table device 80 As shown in FIG. 12 (C), when the boom 50 is placed over the mounting body 90, the lifting of the boom mounting table device 80 is stopped, and the boom 50 is maintained on the boom mounting table device 80, while maintaining the state. The carriage 72 is pulled rearward by the fixed handle 78 to move the entire boom transfer device 70 along the rail 8 toward the boom welding machine 21, and the boom 50 is taken out of the boom transport conveyor 1 to remove the boom welding machine. Transfer to 21. As shown in FIG. 13D, when the bogie 72 arrives near the front of the boom welding machine 21, the boom mounting table device 80 is manually slid to the rear side of the bogie. As shown in FIG. 13E, the boom mounting device 80 reaches the rear end of the support frame 75, and the boom 50 mounted on the boom mounting device 80 approaches the boom support 22 of the boom welding machine 21. Then, both ends of the boom 50 are connected to the boom support 22. When the boom 50 is supported by the boom support 22, the bogie 72 is slightly moved forward to separate the entire boom transfer device 70 from the boom welding machine 21. When the boom transfer device 70 is separated from the boom support arm 22 and no longer interferes with the boom welding, the start switch (not shown) of the control box 28 (FIG. 14) located on the side of the column 23 is operated. Then, control means (not shown) using a microcomputer provided in the control box 28 executes welding control based on a welding program input in advance. As a result, as shown in FIG. 14, a cylinder 29 whose one end is connected to one end of the boom support 22 is driven to rotate the boom support 22 around the axis of the support shaft 23a, and the welding arm The welding arm drive unit 25 a mounted on the base end side of the drive 24 is driven to move the welding arm 25 along the ceiling rail 24. For this reason, the welding operation part (not shown) located at the lower end side of the welding arm 25 moves the corner between the side plate 51 and the top plate 52 of the boom 50 and the corner between the side plate 51 and the bottom plate 53 in the boom longitudinal direction. , And the fillet welding a at each corner is performed.
When the welding is completed and the boom support 22 is returned to the boom detaching position, the boom transfer device 70 separated from the boom welding machine 21 is returned to the boom welding machine 21 and the pair of boom mounting table devices 80 is moved. When the boom mounting body 90 of the vehicle enters the lower part of the boom 50, the lift cylinder 74a of the lift device 74 is operated to the rising side, and the boom mounting table device 80 is raised by the lift device 74. As in the case where the boom 50 is mounted on the boom support 22, when the pair of boom mounting bodies 90 of the boom mounting base device 80 comes into contact with the bottom plate 53 of the boom 50, the operation of raising the boom mounting base device 80 is performed. Stop and remove the boom 50 from the boom support 22. When the boom 50 is disengaged from the boom support 22 and is placed over the pair of boom mounts 90 of the boom mounting table device 80, the boom 50 is first removed from the boom transport conveyor 1 and transferred to the boom welding machine 21. Is transferred to the boom transport conveyor 1 in the reverse transfer manner, and is returned and placed on the rollers of the boom transport conveyor 1.
[0032]
As shown in FIG. 1, FIG. 7, FIG. 9, etc., a portion 1a of the boom transport conveyor 1 which is located in front of the boom welding machine 21 is fixed to the ground on the upper side or the lower side in the transport direction from the conveyor portion 1a. And is attached to a pair of left and right conveyor support frames 79 extending forward from the bogie frame 73 and attached to the boom transfer device 70 so as to move therewith. I have.
[0033]
That is, as shown in FIG. 12B, when the boom transfer device 70 removes the boom 50 from the boom transfer conveyor 1 or is set at the boom loading / unloading position for returning to the boom transfer conveyor 1, the boom transfer device 70 is set. The moving conveyor portion 1a mounted on the second conveyor portion is displaced from the other fixed conveyor portion 1b on the side opposite to the side where the boom welding machine 21 is located. For example, the boom 50 that has been processed in the boom temporary assembling facility 10 is transferred to the boom welding facility 20 or the boom 50 that has been processed in the boom welding facility 20 and returned to the boom transfer conveyor 1 is temporarily attached to the next bracket. By setting the boom transfer device 70 to a boom transfer position slightly moved from the boom loading / unloading position toward the boom welding machine 21 when transferring to the equipment 30, the moving conveyor portion 1a is moved to another fixed conveyor portion 1b. On the other hand, the booms 50 are arranged linearly and at the same width, and the boom 50 moves from the fixed conveyor portion 1b on the upper side in the transport direction to the fixed conveyor portion 1b on the lower side in the transport direction through the moving conveyor portion 1a.
Thus, when the boom mounting table device 80 of the boom transfer device 70 is set on the front end side of the support frame 75, the boom mounting table device 80 is less likely to protrude forward from the bogie frame 73, and the boom 50 when the boom 50 is mounted. The boom 50 can be transferred so that the weight balance does not deteriorate the front-rear weight balance of the boom transfer device 70. Further, as compared with a configuration in which the moving conveyor portion 1a can be moved and adjusted on the ground without being supported by the boom transfer device 70, a special adjusting mechanism for moving and adjusting the moving conveyor portion 1a is not required, and the structure is simplified. Is obtained.
[0034]
As shown in FIGS. 19 and 24, the boom support device 31 of the bracket tacking equipment 30 is a fixed side frame that is fixed on the ground by one mounting seat plate 32 on the side of the boom transport conveyor 1 and stands. A supporting frame 35 composed of a body 33 and a lifting / lowering frame body 34 connected to a pair of supporting columns arranged in the boom conveying direction of the fixed side frame body 33 by the boom conveying conveyor 1 over a guide rail portion 33a which is also used; A boom holder 100 having a pair of holder main bodies 101 connected to the elevating frame 34 side by side in the boom transport direction is provided.
[0035]
As shown in FIG. 21, a pair of upper and lower mounting portions 34 b connected to the respective guide rail portions 33 a of the elevating frame 34 are configured to sandwich the guide rail portion 33 a and play on the mounting portions 34 b. It is attached to the guide rail portion 33a by a plurality of rotatable attachment rollers 36, and the elevating frame 34 moves up and down along the guide rail portion 33a with respect to the fixed frame 33. . As shown in FIG. 19, the cylinder bracket 37 connected to the lower end side of the one guide rail portion 33a and the cylinder bracket 38 connected to the back side of the one upper mounting portion 34b, An elevating cylinder 39 composed of an air cylinder is attached to each of the cylinder bracket 37 connected to the lower end of the other guide rail portion 33a and the cylinder bracket 38 connected to the back of the other upper mounting portion 34b. is there.
[0036]
As shown in FIGS. 19 and 24, the boom holder 100 is provided with a pair of upper and lower support portions 34a located at one end of the lifting / lowering frame 34 in the boom transport direction as shown in FIGS. An annular edge portion 101a is slidably supported by a plurality of freely rotatable support rollers 34c that are freely rotatably mounted on the one holder main body 101, the outer peripheral shape of which is substantially circular. The annular edge portion 101a is slidably supported by a plurality of support rollers 34c that are freely rotatably mounted on a pair of upper and lower support portions 34a located at the other end of the lifting / lowering frame 34 in the boom transport direction. The other main body 101 and the pair of main bodies 101 whose outer peripheral shape is substantially circular are integrally rotated, and the distance between the main bodies 101 is set at a set distance. So as to have configured provided with a plurality of connecting rods 102 that are connected across a pair of holder body 101.
[0037]
In each of the pair of holding body bodies 101, as shown in FIG. 19, the cut portion of the annular edge portion 101a is a boom housing space 103 which is a boom doorway, and is located on the lateral side on the back side of the boom housing space 103. A boom lock mechanism 110 having a pair of lock bodies 111 is provided. As shown in FIG. 19, a pair of operation chains 121 and 122 of a rotation adjusting mechanism 120 are connected to an outer surface of one of the holder main bodies 101.
[0038]
As a result, in the bracket temporary attachment facility 30, the processing of the bracket temporary attachment is performed as shown in FIGS. 25, 26, and 27.
[0039]
That is, as shown in FIGS. 25A and 25B, the boom holder 100 is supported by the lifting / lowering frame 34 in a mounting posture in which the boom entrance / exit of the boom accommodating space 103 faces downward. An elevating valve (not shown) located on an operation panel 33c supported by a support arm 33b of the body 33 is switched to a descending side by manual operation. Then, the pair of elevating cylinders 39 is operated to move down, and the elevating frame 34 is operated to descend to adjust the boom holder 100 to descend. When both ends of the boom 50 placed on the boom transport conveyor 1 enter the boom accommodating space 103 of the holder main body 101 and the bent portions 50a of the boom 50 enter between the holder main bodies 101, the boom holder 100 The downward adjustment is stopped, and a lock valve (not shown) located on the operation panel 33c is manually switched to the lock side. Then, the lock body 111 of the boom lock mechanism 110 of each holder main body 101 operates to the lock side. One end of the bent portion 50a of the boom 50 is fixed to one holder main body 102 by one boom lock mechanism 110, and the other end of the boom 50 is bent to the other holder main body 102 by the other boom lock mechanism 110. When it is fixed, the boom cylinder bracket 57 is applied to the bottom plate side of the boom bending portion 50 as shown in FIG. When the temporary attachment of the boom cylinder bracket 57 is completed, the elevating valve is switched to the ascending side. Then, as shown in FIGS. 26 (a) and 26 (b), both lifting cylinders 39 are driven upward and the lifting frame 43 is raised to adjust the boom holder 100 upward. When the boom 50 rises from the boom transport conveyor 1 and the boom 50 is rotated as follows, and the top plate side of the bent portion 50a has a height above the ground at which welding work is easy, the elevation adjustment of the boom holder 100 is stopped. A forward rotation switch (shown) located on the operation panel 33c is manually turned on and operated. Then, the rotation adjusting mechanism 120 is driven to the forward rotation side, and the boom holder 100 is rotated in the forward rotation direction with respect to the elevating frame 34 to rotate the boom 50. When the bottom plate side of the boom 50 faces upward as shown in FIGS. 27A and 27B, the rotation operation of the boom holder 100 is stopped, and as shown in FIG. The arm cylinder bracket 58 is applied to the top plate side of 50a, and is temporarily attached by artificial welding. When the temporary attachment of the arm cylinder bracket 58 is completed, the reverse rotation switch (not shown) of the operation panel 33c is manually turned on and operated. Then, the rotation adjusting mechanism 120 is driven to the reverse rotation side to rotate the boom holder 100 in the reverse rotation direction to rotate the boom 50. When the bottom plate side of the boom 50 faces downward, the rotation operation of the boom holder 100 is stopped, the two lifting cylinders 39 are operated to the lower side, and the boom holder 100 is operated to descend to lower the boom 50. When both ends of the boom 50 are placed on the rollers of the boom transport conveyor 1, the boom lock mechanism 110 of each holder body 101 is switched to the unlocking side to release the boom holder 100 from holding the boom 50. Is returned to the boom transport conveyor 1 and placed.
[0040]
As shown in FIG. 1, the bracket attaching equipment 40 removes the boom 50 from the boom transport conveyor 1 by a hoist crane (not shown) and transfers the boom 50 to the bracket welder 41 or from the bracket welder 41 to the boom transport conveyor 1. It is configured to return. Further, by connecting the pivoting bracket 55 and the arm connection bracket 56 of the boom 50 to the boom support rod 42 of the bracket welding machine 40, the boom support rod 42 supports the boom 50. Further, the welding arm 43 hanging from a ceiling rail (not shown) is automatically controlled to reciprocate along the ceiling rail so as to move relatively to the boom 50 in the longitudinal direction thereof, and the boom is supported. By automatically controlling the rod 42 to rotate, the arm cylinder bracket 58 and the boom cylinder bracket 57 are attached by automatic welding by the welding arm 43.
[0041]
The boom support 22 of the boom welding machine 21 is configured to detachably support the boom 20 at two locations on the base end side and the distal end side of the boom 50 by the mounting structure shown in FIGS. . In both the boom distal end mounting structure and the boom base end mounting structure, a support cylinder is detachably mounted on the surface side of the boom support 22 by a mounting seat plate 131 to provide a boom support 132, and the boom 50 is pivotally mounted. A connection pin 133 configured to be removably inserted between the bracket 55 or the arm connection bracket 56 and the support portion 132 is mounted.
As a result, the boom support 22 of the boom welding machine 21 supports the pin hole of the pivot bracket 55 as the mounting portion 55a on the base end side of the boom 50 so that the base end of the boom can be detachably attached. The hole serves as a mounting portion 56a on the distal end side of the boom 50 so that the distal end side of the boom can be detachably supported.
[0042]
Both the support tube forming the boom support portion 132 in the mounting structure on the boom base end side and the support tube forming the boom support portion 132 in the mounting structure on the boom distal end side are set in advance according to the type of the boom 50. A support cylinder corresponding to the boom 50 to be manufactured this time is selected from a plurality of prepared support cylinders and adopted. The positioning protrusion 131a on the back side of the mounting seat plate 131 is inserted into one of the mounting holes 134 selected from the plurality of mounting holes 134 and 135 provided in the boom support 21 so as to be mounted on the selected one mounting hole 135. By attaching a detachable fixing pin 131b over the upper end side of the seat plate 131, the boom support 132 is attached to the boom support 21 and is prevented from rotating.
[0043]
As shown in FIGS. 7 and 9, the boom mounting table device 80 of the boom transfer device 70 includes a lower frame 82 on which the ring body 81 is freely rotatable at a lower end side, and a front end of the lower frame 82. The front end side is slidably clamped by a plurality of support rollers 83 which are freely rotatably mounted on the support plate portion 82a located on the side, and the support plate portion 82a located on the rear end side of the lower frame 82. The upper base frame 84 having a base plate portion 84a whose rear end side is slidably held by a plurality of support rollers 83 freely rotatably mounted on the upper base frame 84, and a pair of front and rear vertical plate frame portions 84b of the upper base frame 84. The one boom mounting body 90 supported over one end side in the upper underframe lateral direction, and the other boom supported across the other end side in the upper underframe lateral direction of the pair of front and rear vertical frame portions 84b. The mounting body 90, the upper table Includes a link mechanism 95 which is located on the front side and the rear side 84 are configured.
[0044]
As shown in FIGS. 7 and 8 and the like, each of the pair of left and right boom mounting bodies 90 includes a bearing member 85 fixed to the vertical plate frame portion 84b on the front side of the upper frame 84, and a rear portion of the upper frame 84. The intermediate portion in the longitudinal direction is rotatably connected to a rotation support shaft 91 rotatably supported by a bearing member 85 fixed to the vertical plate frame portion 84b on the side of the rotation support shaft 85. A pair of roller support plates 92 arranged at predetermined intervals in the axial direction, and at a plurality of positions in the longitudinal direction of the roller support plates 92, the pair of roller support plates 92 are parallel to the axis of the rotation support shaft 91. A boom mounting roller 93 is provided so as to freely rotate around the axis.
[0045]
In other words, the pair of boom mounting bodies 90 is supported by the upper frame 84 in an arrangement arranged in the longitudinal direction of the boom 50 mounted on the boom mounting table device 80. Each boom mounting body 90 forms a boom mounting surface 94 at the upper end of the plurality of boom mounting rollers 93 arranged in the longitudinal direction of the boom 50, and the boom mounting surface 94 forms a bottom plate of the boom 50. Side, and rotates about the axis 91a of the rotation support shaft 91 in a direction perpendicular to the longitudinal direction of the mounted boom 50 with respect to the upper frame 84. I have.
[0046]
Both the link mechanism 95 located on the front side of the upper underframe 84 and the link mechanism 95 located on the rear side are provided at one end of the rotation support shaft 91 of one boom mounting body 90 as shown in FIG. The base end is rotatably connected to the operation arm 96 for rotating the boom mounting body 90, and the base end is integrally rotated to the end of the rotation support shaft 91 of the other boom mounting body 90. An operation arm 96 that is freely connected to rotate the boom mounting body 90 and a bending link 97 that is connected across the pair of operation arms 96 are provided. A connecting pin 98 for connecting the ends of the pair of link members 97a of the bending / extending link 97 opposite to the operation arm 96 side so as to be relatively rotatable is fixed to the vertical plate frame portion 84b of the upper base frame 84. It is supported by a slide block 99 which is slidably engaged with a guide rail 86 which is vertically directed to the underframe.
[0047]
That is, both the link mechanisms 95 on the front and rear sides make the pair of boom mounting bodies 90 interlock as follows by interlocking the rotation support shafts 91 of the pair of boom mounting bodies 90. That is, the pair of boom mounting bodies 90 are linked so as to rotate in the opposite rotation directions. When one of the boom mounting bodies 90 is mounted along the bottom plate 53 at a position where the boom mounting surface 94 is at one end from the bent portion 50a of the boom 50, the other boom mounting body 90 also The boom mounting surface 94 is interlocked with the boom 50 so as to be attached along the bottom plate 53 at a position on the other end side of the bent portion 50a of the boom 50.
[0048]
Thus, in the boom mounting table device 80, the mounting of the boom 50 to the boom support 22 of the boom welding machine 21 is performed as shown in FIGS.
[0049]
That is, as shown in FIG. 17A, the boom transfer device 70 is set at the boom loading / unloading position brought to the boom transport conveyor 1, and the pair of boom mounts 90 enters below the boom 50 on the boom transport conveyor. As shown in FIG. 17B, when the boom mounting table device 80 is raised by the lifting device 74, one of the boom mounting bodies 90 comes into contact with the bottom plate 53 at a position on one end side of the bent portion 50a of the boom 50, and The boom mounting body 90 comes into contact with the bottom plate 53 at a position on the other end side of the boom from the bent portion 50a of the boom 50, and the pair of boom mounting bodies 90 push up the boom 50. At this time, as shown in FIG. 18A, a pair of right and left fixed fixing pieces 141 extending downward from the sliding block 99 of the one link mechanism 95 are fixed to the support plate portion 82a of the lower underframe 82. When the connecting pin 98 tries to descend along the guide rail 86, the restricting piece 141 enters the gap 143, and a pair of the rotation stoppers 142. The rotation of the boom mounting body 90 is allowed. Therefore, as shown in FIG. 17 (b), when the boom 50 is slightly displaced in the boom longitudinal direction with respect to the boom mounting table device 80, each boom mounting body 90 will have its boom mounting surface 94 Abuts against the boom 50 in an inclined mounting posture with respect to the boom bottom plate 53. However, in this case, as shown in FIG. 17 (c), when the boom 50 floats above the rollers of the boom transport conveyor 1, the boom mounting bodies 90 are attached due to the boom load. By rotating around the axis 91a and the both boom mounting bodies 90 being linked by the link mechanism 95, the boom mounting surface 94 of each of the boom mounting bodies 90 has a boom. It naturally changes to the mounting posture along the bottom plate 53 of 50. Then, due to the change in the mounting posture, the boom 50 is adjusted to move in the longitudinal direction of the boom from the initial mounting state on the boom mounting table device 80, and the displacement with respect to the boom mounting table device 80 is corrected. Mounting state. Thus, the boom transfer device 70 is moved toward the boom welding machine 21 so that the boom 50 taken out from the boom transport conveyor 1 is mounted on the boom support 22 of the boom welding machine 21, and the boom mounting table device 80 is supported. When the boom transfer device 70 is moved upward and adjusted to the rear end side of the boom 75, the position of the upper underframe 84 with respect to the boom support 22 in the boom longitudinal direction is determined because the boom transfer device 70 is mounted on the rail 8. As shown in the figure, the mounting portions 55a and 56a at both ends of the boom 50 are brought into a state in which they are aligned with the corresponding support portions 132 of the boom support 22. In other words, the connection pin 133 can be mounted with almost no adjustment for aligning the mounting portions 55a and 56a with the support portion 132.
[0050]
Even if the boom transfer device 70 is set at the boom loading / unloading position brought to the boom transport conveyor 1, the boom 50 on the boom transport conveyor is slightly displaced in the transport direction, and the boom mounting body 90 is moved to the boom bent portion 50a. 18 (b), the upper frame 84 is guided by the support rollers 83 of the lower frame 82 to manually move and adjust the support frame 17 in the lateral direction of the boom transfer device, as shown in FIG. The pair of boom mounting bodies 90 are moved and adjusted in the lateral direction with respect to the lower underframe 82 so as to match near the lower part of the boom bent part 50a, and then enter the lower part of the boom 50. At this time, as shown in FIG. 18 (b), the lower end of the regulating piece 141 of the sliding block 99 is located above one of the pair of left and right detent members 142 of the lower underframe 82, When the connecting pin 98 attempts to descend along the guide rail 86, the lower end of the restricting piece 141 abuts on the upper edge of the detent member 142, and the detent member 142 prevents the coupling pin 98 from descending further. The rotation of the boom mounting body 90 is regulated so that the pair of boom mounting bodies 90 does not rotate any more. As a result, the boom mounting table device 80 is raised and the pair of boom mounting bodies 90 push up the boom 50, and the boom 50 floats from the boom transport conveyor 1 and the boom load is applied to the pair of boom mounting bodies 90. Even if it is hung, each boom mounting body 90 remains in the mounting posture in which the boom mounting surface 94 is inclined with respect to the boom bottom plate. In this case, before or after moving the boom 50 taken out of the boom transport conveyor 1 toward the boom welding machine 21, the upper underframe 84 is moved laterally with respect to the lower underframe 82 to operate the upper underframe 84. The left and right centers are adjusted to the mounting positions that match the left and right centers of the lower underframe 82. If this position adjustment is performed, the regulating piece 141 is aligned with the gap 143 between the pair of detent members 142. Then, the pair of boom mounting bodies 90 are rotated due to the boom load, and the boom mounting surface 94 is in the mounting posture along the boom bottom plate 53, and the boom 50 is initially mounted on the boom mounting base device 80. Even if the mounting state is slightly displaced in the longitudinal direction, an appropriate mounting state is obtained in which the positional shift is corrected. Thereby, even when the boom mounting body 90 is moved laterally with respect to the lower underframe 82 and the boom 50 is mounted, the boom 50 taken out from the boom transport conveyor 1 is transferred to the boom support 22 of the boom welding machine 21. When the boom transfer device 70 is moved toward the boom welding machine 21 to be mounted, the boom mounting table device 80 is moved to the rear end side of the support frame 75 and is adjusted upward. 55a and 56a are aligned with the corresponding support portions 132 of the boom support 22. In other words, the connection pin 133 can be mounted with almost no adjustment for aligning the mounting portions 55a and 56a with the support portion 132.
[0051]
As shown in FIGS. 20 and 28, the boom lock mechanism 110 provided on each of the holder main bodies 101 in the boom support device 31 is provided at both ends of a support rail 113 fixed to the holder main body 101 with a bracket 112. The lock body 111 on which the mounting portion 111a is slidably fitted, a lock cylinder 115 in which a rod 115a is connected to an operation portion 111b of each lock body 111 via a hip break link 114, and one of the lock bodies 111 , And a pair of guide members 116 that individually act on the buckle link 114 connected to the other lock body 111.
[0052]
Each of the guide members 116 is fixed to the connecting rod 102 connecting the holder main bodies 101 to each other, and the guide member 116 has a base end side of the cylinder side link body 114a of the waist broken link 114. The base end side guide groove 116a in which the cylinder connecting pin 118 slidably connected to the joint member 117 fixed to the rod 115a of the lock cylinder 115 is slidably inserted, and the hip break link 114 A guide groove 116b is provided in which a link connecting pin 119 for rotatably connecting the distal end side of the cylinder side link body 114a and the base end side of the lock body side link body 114b is slidably inserted. . Each lock cylinder 115 is an air cylinder, and the tube side of the lock cylinder 115 is fixed to the connecting rod 102 as shown in FIG.
[0053]
As a result, the lock mechanism 110 provided on each of the holder main bodies 101 is switched between the locked state and the unlocked state by operating the pair of lock cylinders 115.
That is, when the pair of lock cylinders 115 is operated to the lock side, each of the hip break links 114 is moved along the base guide groove 116a and the distal guide groove 116b by the rod 115a that protrudes and operates the lock cylinder 115. The lock body 111 is slid toward the support rail 113 to slide toward the center of the support rail 113 in the longitudinal direction. Then, as shown in FIG. 29, the pair of lock bodies 111 leans inward in the width direction of the boom housing space 103, and the boom 50 is clamped by the lock action portion 111b on the distal end side. As a result, the boom lock mechanism 110 enters a locked state in which the boom 50 is fixed to the holder main body 101 by the pair of lock bodies 111 and the boom holder 100 is held in a state of rotating therewith.
When the pair of lock cylinders 115 are operated to the unlocking side, each of the hip break links 114 is moved along the base guide groove 116a and the distal guide groove 116b by the rod 115a of the lock cylinder 115 with which the lock cylinder 115 retracts. The lock body 111 slides toward the end of the support rail 113 along the support rail 113. Then, the pair of lock bodies 111 move away from each other in the lateral width direction of the boom housing space 103, and the holding of the boom 50 by the lock operation portion 111b on the distal end side is released. As a result, the boom lock mechanism 110 is unlocked so that the fixing of the boom 50 to the holder main body 101 is released and the boom 50 can be placed on the boom transport conveyor 1.
[0054]
As shown in FIG. 19, the rotation adjusting mechanism 120 of the boom support device 31 includes a chain winding device 123 attached to the elevating frame 34, and the pair of operation units extending from the chain winding device 123. It comprises chains 121 and 122.
[0055]
A winding guide 124 formed by the extending end of each of the operation chains 121 and 122 is formed by an end of the connecting rod 102 from which the lateral outer surface of the one holding body 101 protrudes. The outer side surface is wound around a winding guide 125 attached to an alligator and arranged along the periphery of the holder main body 101, and the extended ends of the operation chains 121 and 122 are positioned near the boom entrance and exit of the boom housing space 103. To the supporting body 26 fixed to the holding body 101.
[0056]
Accordingly, when the electric motor (not shown) of the chain winding device 123 is driven in the forward rotation or the reverse rotation direction, the rotation adjusting mechanism 120 causes the chain winding device 123 to rotate the electric motor (not shown). While the one operation chain 121, 122 is being extended by the driving force, the other operation chain 122, 121 is wound up and collected, and the boom holder 100 is rotated forward or backward by the winding force of the operation chain 122, 121. The rotary operation is performed.
[0057]
In this boom assembling line, a plurality of types of booms 50 having different digging capacities are provided on backhoes of different models and have different lengths and thicknesses. When the large boom 50 is held by the boom holder 100 and when the small boom 50 is held by the boom holder 100, the boom center of gravity is located at a different position in the depth direction of the boom housing space 103. . Therefore, as the rotation axis X that the boom holder 100 is rotated by the rotation adjusting mechanism 120, a rotation axis that passes through the boom center of gravity when any one of the booms 50 is held by the boom holder 100 is set. Then, the maximum value of the displacement between the center of gravity of the boom and the rotation axis X of the boom holder that occurs when other types of booms 50 are held becomes extremely large. For this reason, the position of the center of gravity of the plurality of types of booms 50 is set so that the maximum value of the displacement between the center of gravity of the boom and the rotation axis X of the boom holder generated when the plurality of types of booms 50 to be manufactured is held is minimized. An average center of gravity obtained by averaging the calculated values is calculated, and a rotation axis passing through the average center of gravity is set as a rotation axis X of the boom holder 100.
Thus, even when any of a plurality of types of booms 50 to be manufactured is held, the boom holding body 100 is smoothly rotated and the boom holding body 100 is smoothly rotated, for example, it is difficult for the boom holding body 110 and the boom holding body 110 to be twisted. 50 rotation operations can be performed smoothly.
[0058]
[Another embodiment]
The present invention is not limited to the boom mounting table device 80 used for mounting the boom 50 to the boom welding machine 21 as in the above-described embodiment, the bracket welding machine 41 for welding the arm cylinder bracket 58 and the like to the boom 50, and the like. Also, the present invention can be applied to a boom mounting table device that is configured to be used when the boom 50 is mounted on a working machine that performs various types of machining processing of the boom 50. Accordingly, the boom support 22 of the boom welding machine 21, the boom support of the bracket welding machine, and the like are collectively referred to as a working machine 22 that performs a machining process of the boom 50.
[0059]
In addition, the present invention can be applied to a mounting table device used for manufacturing a boom of various working devices such as a lifting crane device and a clamshell bucket device, in addition to a mounting table device used for manufacturing a boom mounted on a backhoe device. . Therefore, booms such as a backhoe device and a lifting crane device are collectively referred to as a boom.
[Brief description of the drawings]
FIG. 1 is a schematic plan view of a boom assembly line. FIG. 2 is a side view of the entire backhoe. FIG. 3 is a perspective view showing a completed state of the boom. FIG. FIG. 6 is an explanatory view showing a boom bracket welding state; FIG. 7 is a front view of the boom transfer device; FIG. 8 is a plan view of the boom transfer device; FIG. 9 is a view of the boom transfer device; Side view [FIG. 10] Rear view of boom transfer device [FIG. 11] Front view of boom welding machine [FIG. 12] Explanatory view showing boom transfer procedure [FIG. 13] Explanatory view showing boom transfer procedure [FIG. 14] Boom welding FIG. 15 is a front view of a boom mounting structure of a boom support; FIG. 16 is a front view of a boom support of a boom support; FIG. 17 is a front view of a boom transfer device; Illustration (Fig. 18) FIG. 19 is a front view showing an operation state of the mechanism, and FIG. 19B is a front view showing an operation restriction state of the link mechanism. FIG. 19 is a side view of the entire boom support device. FIG. 20 is a side view of a boom holder. 20 is a sectional view taken along the line AA of FIG. 20. FIG. 22 is a sectional view taken along the line BB of FIG. 20. FIG. 23 is a sectional view taken along the line CC of FIG. 20. 25: Explanation of bracket temporary attachment procedure [FIG. 26] Explanation of bracket temporary attachment procedure [FIG. 27] Explanation of bracket temporary attachment procedure [FIG. 28] Top view of boom lock mechanism [FIG. 29] Lock of boom lock mechanism FIG. 30 is a front view of a conventional boom mounting table device.
1 Boom Transport Conveyor 22 Work Machine 50 Boom 50a Boom Bend 55a, 56a Boom Attachment 70 Boom Transfer Device 84 Underframe 90 Boom Placement Body 91a Boom Placement Body Rotating Axis 93 Roller 94 Boom Placement Surface 95 Link mechanism

Claims (4)

A boom mounting table device for mounting the boom to a working machine that performs a processing by supporting a boom having a bent shape at a plurality of mounting portions located in a longitudinal direction of the boom,
A boom mounting body for mounting one end side from the bending part of the boom, and a boom mounting body for mounting the other end side from the bending part of the boom, an axis of a direction perpendicular to the boom longitudinal direction. The pair of boom mounting bodies are pivotally supported around the base frame so that the pair of boom mounting bodies rotate in conjunction with each other, and the boom mounting surface of one of the boom mounting bodies is closer to one end than the bent portion of the boom. When the state is along the part in the above, the pair of boom mounting bodies are linked so that the boom mounting surface of the other boom mounting body is along the part on the other end side from the bent part of the boom. Mounting device having a link mechanism. 2. The boom mounting base device according to claim 1, wherein the boom mounting surfaces of the pair of boom mounting bodies are formed by rollers. The boom mounting table device according to claim 1, wherein the work machine is a work machine that performs the work processing of the boom in one of a plurality of work processing steps in a boom assembly line. The boom mounting table device according to claim 3, wherein the underframe is a frame of a boom transfer device that transfers the boom across the work machine and a boom transport conveyor in the boom assembly line.

Images